This tastes just like regular strawberry mousse, but it is not made with the usual egg whites or whipped cream (or Rich’s Whip). If you haven’t already heard about aquafaba, you won’t believe what aerates the mousse. Here are the three ingredients in this mousse: strawberries, sugar and–this is the part that makes the mousse fluffy–the water from a can of chickpeas.
If you take the liquid that beans were cooked in and whip it, it turns into meringue. If you want the story behind all this, take a look at this interview with Goose Wholt. There is a Facebook page dedicated to this topic: Vegan Meringue–Hits and Misses.
If you want to see a video of how to make this, look at this youtube video by Tivonika:
I ended up using different proportions of strawberry, sugar and chickpea liquid, but the basic methodology is the same.
Bonus: If you want to know how to make the crunchy bits sprinkled on top of the strawberry mousse, take a look at this Passover recipe by Estee Kafra.